LED CHASER USING IC 555 AND CD 4017 | Decade Counter | DANCING LED

In this tutorial, I will show you how to make simple a LED Chaser using IC 555 & IC 4017. You can watch the YOUTUBE video above. you can continue reading the post for further more details.

1) IC 555

2) CD 4017

3) LEDS any color

4) Resistor

a) 10 Kohm

b) 100 ohm for LEDs

5) potentiometer

a) 10 Kohm

6) capacitors

a) 10 uF

b) 0.01 uF

7) power supply (5V to 12V)

Construct the circuit as shown in the circuit diagram.

For making the LED Chaser you require 555 Timer & 4017 Counter. The 555 Timer is used to produce the clock pulses for the 4017. The 4017 is constructed in an Astable configuration. When the clock pulse produced by the 555 timer is fed to the 4017, it starts counting in the upward direction for each pulse. Now when you connect the LEDs to the outputs you get the sequential glow. The duration of the glow of LEDs can be altered by changing the value of the pot (RV1) & the value of the C2 Capacitor. or only by changing the value of the pot (RV1).

Extra Info: In the circuit diagram I showed the circuit which counts up to the value 10. You can change the value of the count by simply connecting the last sequence to the reset pin. For example, Let say you want the count to be 6Then you need to connect the Q0 to Q5 to the LED's & the Q6 to the Reset Pin 15. The remaining pins from Q7 to Q9 will be No Connection.

The testing of the circuit can be watched in the video attached in the first step or you can CLICK HERE
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